The Environmental Protection Agency (EPA) is granting a petition submitted by Occidental Chemical Inc. (Occidental), to exclude from hazardous waste control (or delist) certain solid wastes. The wastes being delisted consist of Rockbox Residue, and Limestone Sludge. This action responds to Occidental Chemical's petition to delist these treated wastes on a ``generator specific'' basis from the lists of hazardous waste. After careful analysis, the EPA has concluded that the petitioned wastes are not hazardous wastes when disposed of in Subtitle D landfills/surface impoundments. This exclusion applies to Rockbox Residue and Limestone Sludge generated at Occidental Chemical's Ingleside, Texas facility. Accordingly, this final rule excludes the petitioned wastes from the requirements of hazardous waste regulations under the Resource Conservation and Recovery Act (RCRA) when disposed of in Subtitle D landfills/surface impoundments but imposes testing conditions to ensure that the future-generated wastes remain qualified for delisting.